David L. Guyton

Should Early Surgery be Performed for Head Tilts to Prevent Facial Asymmetry?

Carole R. Goodman, Elizabeth Chabner, David L. Guyton

Significant facial symmetry associated with a head tilt is ocasionally seen in patients with strabismus. Traditional of thalmologic teachindg suggests that longstanding head tilts from motility disorders can lead to the development of facial asymmetry, 1 a concept borrowed from the orthopedic …

A Combination Horizontal/Vertical Prism Bar

Ursula R. Flüeler, Kelly M. Elhatton, David L. Guyton

Errors in measurement of an ocular deviation can occur if prisms are held in a position for which they are not calibrated, and this fact may help explain variable results in strabismus surgery. 1

Central fixation detection with an open-frame retinal birefringence scanning system: Optics, optomechanics, polarization balancing aspects, computer modeling and simulation

Boris I. Gramatikov, Kristina Irsch, David L. Guyton

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Corneal reshaping: an experiment with a type I collagen-based vitrigel for remodeling porcine corneas

Maria Carolina Marquezan, Denise de Freitas, Shoumyo Majumdar, Xiaokun Wang et autres

PURPOSE: This study aimed to report an experiment designed to determine anatomical changes in porcine corneas following placement of a novel polymer implant into the cornea. METHODS: An ex vivo porcine eye model was used. A novel type I collagen-based vitrigel implant …

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Comment on: Masquerading superior oblique palsy

David L. Guyton

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Disconjugacy of Eye Movements during Attempted Fixation: A Sufficient Marker for Amblyopia?

Kristina Irsch, David L. Guyton, Robert B. Geary, Jing Tian et autres

BACKGROUND: To investigate whether detection of disconjugacy of eye movements during attempted fixation, or interocular position instability, may serve as a single sensitive test for amblyopia. PATIENTS/METHODS AND MATERIAL: Binocular eye movements were recorded at 500 Hz using the EyeLink 1000 eye …

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How Lingering Fusional Adaptation Influences the Bielschowsky Head Tilt Test in Superior Oblique Paresis

Kristina Irsch, David L. Guyton, Howard S. Ying

BACKGROUND: The lack of a positive Bielschowsky head tilt test (BHTT) is commonly seen as an indicator that superior oblique paresis (SOP) is not present. This study investigated the influence of fusion on the BHTT in unilateral SOP. PATIENTS/METHODS AND MATERIAL: We …

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Cylindrical lens transforms red and green laser pointers into streak generators used for Lancaster red-green testing at minimal cost

Mireille N. Jabroun, Edward Kuwera, Rachel R. Milante, David L. Guyton

Reaching for the Holy Grail in strabismus: the mechanism underlying infantile esotropia

David L. Guyton

Torsional incomitance after asymmetrically adjusted Harada-Ito procedures for the simultaneous correction of vertical and torsional deviations in bilateral trochlear nerve palsy

Mireille N. Jabroun, Justin D. Marsh, David L. Guyton

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Increasing incidence and risk factors for divergence insufficiency esotropia

Xinyi Chen, Justin D. Marsh, Sidra Zafar, Elizabeth E. Gerber et autres

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Inferior Oblique Muscle “Overaction” Caused by Inferior Oblique Muscle Shortening, Not by Hypertonicity

Oded Lagstein, David L. Guyton

Purpose: To determine whether fusional vergence adaptation in patients who can fuse in at least some gaze positions can cause curvature of the non-fixing eye movement paths of patients with apparent “overaction” or “underaction” of the oblique muscles, yielding possibly erroneous evidence …

il (code pays fourni par la source)